Clock



FIG. 1 is a front perspective view of a clock, showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view hereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a side elevation view thereof taken from the right of FIG. 1; and,

FIG. 7 is a side elevation view thereof taken from the left of FIG. 1.

The broken lines showing the numbers on the clock in FIGS. 1, 2, and 3 are for illustrative purposes only and form no part of the claimed design. 

We claim, the ornamental design for a clock, as shown and described. 